CINCINNATI (AP) — The Ohio State Highway Patrol says the driver of a Greyhound bus that ran off an interstate and flipped over apparently began coughing while drinking coffee and possibly choked on it before passing out just before the accident, which injured at least 35 people.

An Ohio Highway State Patrol officer investigates an overturned Greyhound bus following a crash on Saturday, Sept. 14, 2013, along interstate 75 in Liberty Township, Ohio. At least 35 people were injured in the accident. (AP Photo/The Cincinnati Enquirer, Jeff Swinger)

Lt. Ed Mejia said Monday the final report on the Sept. 14 accident should be released this week.